When I hit the X to close the program, I get an error "Unhandled exception has occurred in your application." I'm using 64bit Windows 7.
That would be because I forgot to check if logging is enabled before trying to dispose of an object that only exists if logging is enabled.
I've released a new version that fixes that bug, along with a couple errors with the logging output. The biggest change in this version is that the copy mod function has been removed, and it now creates an addon for the selected mod instead. The addon requires that the base mod also be enabled when launching the game. So if you select CK2+ as the mod to use for generation, the program will create a mod called "KA for CK2+", and you'll need to enable both mods when starting the game.